Vibrator for spark-coils.



UNITE@ rllriililtl PATENT tllFlCE.

EID'WARD B. JACOESON, `OF PITTSFIEYLD. MASSACHUSETTS, ASSIGNOR T0 JACOBSON- BRANDOV COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

VIBRATOR FOP.. SPARK-C0115 Specification of Letters Patent. llattxiirti Fei). 22, iillli.

Application tiled November 12, 1907'. Serial 310.401.839.

llc it ltuown that l, lnwxxnn B. Jameson, a citizen of the United States, residing at littsteld, in the county of Berkshire and Stale ol Massachusetts, have invented certain new and useful Improvements in Vibrators tor Spark-Coils, oi' which the -following is a specification.

yl`his invention relates to vibratile devices commonly employed in the primary circuitl ot induction or spark coils, m conpmctlon with controlling mechanism, for rapidly interrupting the circuit at a predetermined point.

A principal object of my invention is to provide an improved form of vibrator insuring the breakage of the circuit simultaneously with the downward movement 01" the armature, regardless of prevailing at- -mospheric conditions or the 'adhesive state of the contacts resulting from wear or other causes. And a further object is to provide a vibratile clement possessing improved flexibility which may be swung out of the path of its normal movement and into p0si' tion for inspection, and restored to its original position, without necessitating its removal or the readjustment of the contacts. And with the foregoing and other objects in View my invention consists in certain features of construction7 arrangement and conr hination of parts as hereinafter described and claimed, reference beingl had to the drawings, forming a part of this specification, in which corresponding parts are designated by similar reference characters.

Referring to the drawings, Figure 1 is a sectional side elevation of my device operatively mounted upon an induction coil, also shown in section; Fig. 2 is a plan view ot the same, showing the vibratile element swung into position for inspection; Fig. 8 is a view similar to Fig. 1, showing a. modified construction of the bridge and vibratile ele meut support.; and Fig. 4 is a plan View of the saine; Fig. 5 is a detail View of the depending rockerarm; and Fig. t3 is a detail View ot the means for alining the vibratile element.

18 representsan induction coil unit supposed to contain the usual primary and secondary windings and provided with a cover 17, preferably of insulating material, through which projects one end of a core or magnet 14. vil atile element comprising spring 12 is pivotal] y secured at its rear end to one side of the cover 17 and projected t'recl y over the core 14. The ari-nature preferably consists of a strip of readily niagnetized metal having' an enlarged area di-V rectl y over the core and provided at its free end with an upwardly extending hoolt 11,

Y. the point ot which is turned rearward and bears movably upon the free end of the spring 12. The rear end of the armature is riveted or otherwise firmly secured to a metal strip or spring 21 niovably supported on a metal block or standard 10 provided on the cover. The spring 12 is secured at its rear end to the block 10 and projected for-` wardly over the armature, the 'tree end of the spring being provided with a contact 16 adapted to engage with a separate contact 15 supported independently of the vibratile element. Said spring 12 preferably bent centrally at a point over the rear end of the armature, upon which the spring bears movably, so as to assume at its tree end a spaced position in parallel with the free end of the armature. An intermediate plate of metal 2:2 is preferably interposed between the spring 21 and the rear end of the spring 12 to maintain the pa lallcl relation thereof, and, together with said springs, provided with a suitable aperture for the reception of a post 7, which secures said parts to the block 10. Said post 7 is threaded at its .lower end to engage with a threaded aperture provided in the block 10 andis further preferably provided with a knurl head 6 at its other end and centrally with a flange 8 having an even surface on its under side which is adapted to hold thel parts composing the vibratilc element in rigid ei'igagement with the block 10 when rotated downi'ard. A11 interstiee at 5 is provided between the rear end of the armature and the plate 2Q for the purpose ofimproving the tiexibility of the vibratile element at this point. Said block 10 is preferably further provided with a vertical iange or shoulder 23 engaging one side of the vibratile element and extending '55 an armature 13 and a contact-supporting tion, as shown in Fig. 2, and when returned to operative position the ange 23 serves to restore its true alinement by stopping the movement of the armature at apoint where the contacts 15, 16, are in the same vertical line, thus obviating the necessity of. readjusting the contacts 15, 16.

As shown, the contact 15 is provided at one end ot an adjusting screw 2 carried by a bracket t which is projected laterally from a bridge 9 securf 'l to the cover 1T by screws 19. Said adjusting screw 2 is 'preferably operated by a knurl head 1 and secured in the desired position by av nut 3. Said bracket Jf is provided with a depending` rocker-arm 20 suspended over the spring 12 at a point near the rear end of the armature 13. Said rocker-arm is provided, as shown, with a serrated head and an insulated shoulder 1Q (see Fig. 5), at its lower jects under the bracket il. By slightly rotating the rocker-arm the shoulder thereon is brought in contactwith the spring 12 thereby depressing the same and causing the contacts 1'5, 16, to be separated and the `circuit broken without disturbing their adjustment or the position of the armature. When the armature 13 is drawn down'frard by the attraction of the magnetized core 14 the hook 11 which bears upon the free end ot the spring 12 causes the lager to move in synchronism with the armature, thus `ettectually breaking the circuit at the con-- tacts 15, 16, at4 the commencement 'ofthe movement ot the armature. Upon the release of the armature the reflex actionofthe spring 21 is assisted by the spring 12which accelerates the moveinent of the armature upward through the medium of the hook 11. When, however, the armature reaches its true position, which it assumes when at rest, further upward movement is opposed by the spring 12 where it bears upon the rear end of the armature. It will be seen that the limit of upward movement ofthe spring 12 is determined by the engagement of the contacts 15, 16.

As a inodiiied construction of the vibrator device I provide a bridge 24 disposed over the free end of the vibratile element for the support of the adjusting` sciew 2 held in the adjusted position. by a nut 3. Although the bridge 2st is shown as provided with two legs it is apparent that one end ot' such bridge may be cut away thus leaving an opening on one side of the vibratile; element which will enable the operator to swing the vibratile element into a position for inspection similar to that heretofore described and shown in Fig. 2. The provision of a bracket s being 'unnecessary where the bridge is placed over the vibratile contactlti, a tlat head screw' 2:5 is substituted 'for the post T to engage the rear end oi'i2 the vibratile eleend which pro.

ment, in conjunction with a block or stand ard 26;

Having thus described my invention, 1 claim as new, and desire to secure by Letters Patent 1. ln a vibrator, the combination of a contact point, a vibratile elemei.4 al contact A point supported thereon, a pivotal mounting for said vibratile element to permit lateral movement, and a stop to hold the vibratile element in its normal position.

2. In a vibrator, the combination ot a vibratile element pi"otally secured at one end and supporting 'a contact-point at its opposite end, a, separate contact-point, and means on one side of the vibratile element for insuring alinement ofthe same in the 'pathof its normal movement whereby the vibratile element when swung to one side for inspection may be returned to its original position without requiring readjust ment.

3. In a vibrator, a .fixed support, a spring and an armature secured at their ends to said support, the spring extending over the armature and the armature having means for engaging the end of the spring, said spring being constructed to bear movably at a point near its fixed end upon the rear portion of the armature.

4. ln a vibrator, the combination with a pivotally mounted vibratile element of means comprising a shouldered block to automatically insure alinement of the vibratile element in the path ot itsnormal movement, substantially as described.

5. Ina vibrator, the combination of a support, a spring having its rear end secured to said support, a contact point near the free end of said spring, a separate independently sup-ported contact point, an armature tiexibly secured to said support and having its t'ree end engaging the end of the spring, and means for downwardly displacing the free end of said spring in suoli a manner that the circuit may be disrupted independently of the armature. Y

6. ln a vibrator, the combination of a support, a` spring having its rear end secured to said support, a contact point'. near the free 'end of said spring, a separate in-l dependently supported contact point, an armature flexibly secured to said support and having its free end engaging the end ot' the spring, and a rocker-arm arranged to en gage when rocked, the tree'v end of said spring in such manner that the circuit may be disrupted independently of the armature. In testimony whereof I have affixed my signature, in presence of two witnesses.

EDVVARD B. JACOBSON lVitnesses: y

VvliLLiiiii E. BAGG, CARL E. Cozzio.

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